diff options
| -rw-r--r-- | Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt | 14 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 6 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 37 | ||||
| -rw-r--r-- | drivers/iommu/iommu.c | 5 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 32 | ||||
| -rw-r--r-- | drivers/iommu/tegra-gart.c | 20 | ||||
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 2 | ||||
| -rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 4 | ||||
| -rw-r--r-- | include/linux/iommu.h | 10 | ||||
| -rw-r--r-- | lib/dma-debug.c | 10 |
10 files changed, 104 insertions, 36 deletions
diff --git a/Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt b/Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt new file mode 100644 index 000000000000..099d9362ebc1 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt @@ -0,0 +1,14 @@ +NVIDIA Tegra 20 GART + +Required properties: +- compatible: "nvidia,tegra20-gart" +- reg: Two pairs of cells specifying the physical address and size of + the memory controller registers and the GART aperture respectively. + +Example: + + gart { + compatible = "nvidia,tegra20-gart"; + reg = <0x7000f024 0x00000018 /* controller registers */ + 0x58000000 0x02000000>; /* GART aperture */ + }; diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index b40b413db88e..c45513d806ab 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -335,6 +335,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. requirements as needed. This option does not override iommu=pt + amd_iommu_dump= [HW,X86-64] + Enable AMD IOMMU driver option to dump the ACPI table + for AMD IOMMU. With this option enabled, AMD IOMMU + driver will print ACPI tables for AMD IOMMU during + IOMMU initialization. + amijoy.map= [HW,JOY] Amiga joystick support Map of devices attached to JOY0DAT and JOY1DAT Format: <a>,<b> diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index a5bee8e2dfce..d90a421e9cac 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -450,12 +450,27 @@ static void dump_command(unsigned long phys_addr) static void iommu_print_event(struct amd_iommu *iommu, void *__evt) { - u32 *event = __evt; - int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; - int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; - int domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; - int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; - u64 address = (u64)(((u64)event[3]) << 32) | event[2]; + int type, devid, domid, flags; + volatile u32 *event = __evt; + int count = 0; + u64 address; + +retry: + type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; + devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK; + domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK; + flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; + address = (u64)(((u64)event[3]) << 32) | event[2]; + + if (type == 0) { + /* Did we hit the erratum? */ + if (++count == LOOP_TIMEOUT) { + pr_err("AMD-Vi: No event written to event log\n"); + return; + } + udelay(1); + goto retry; + } printk(KERN_ERR "AMD-Vi: Event logged ["); @@ -508,6 +523,8 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt) default: printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type); } + + memset(__evt, 0, 4 * sizeof(u32)); } static void iommu_poll_events(struct amd_iommu *iommu) @@ -2035,20 +2052,20 @@ out_err: } /* FIXME: Move this to PCI code */ -#define PCI_PRI_TLP_OFF (1 << 2) +#define PCI_PRI_TLP_OFF (1 << 15) bool pci_pri_tlp_required(struct pci_dev *pdev) { - u16 control; + u16 status; int pos; pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); if (!pos) return false; - pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control); + pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status); - return (control & PCI_PRI_TLP_OFF) ? true : false; + return (status & PCI_PRI_TLP_OFF) ? true : false; } /* diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 2198b2dbbcd3..8b9ded88e6f5 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -119,6 +119,7 @@ EXPORT_SYMBOL_GPL(iommu_present); * iommu_set_fault_handler() - set a fault handler for an iommu domain * @domain: iommu domain * @handler: fault handler + * @token: user data, will be passed back to the fault handler * * This function should be used by IOMMU users which want to be notified * whenever an IOMMU fault happens. @@ -127,11 +128,13 @@ EXPORT_SYMBOL_GPL(iommu_present); * error code otherwise. */ void iommu_set_fault_handler(struct iommu_domain *domain, - iommu_fault_handler_t handler) + iommu_fault_handler_t handler, + void *token) { BUG_ON(!domain); domain->handler = handler; + domain->handler_token = token; } EXPORT_SYMBOL_GPL(iommu_set_fault_handler); diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 6899dcd02dfa..e70ee2b59df9 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -41,11 +41,13 @@ * @pgtable: the page table * @iommu_dev: an omap iommu device attached to this domain. only a single * iommu device can be attached for now. + * @dev: Device using this domain. * @lock: domain lock, should be taken when attaching/detaching */ struct omap_iommu_domain { u32 *pgtable; struct omap_iommu *iommu_dev; + struct device *dev; spinlock_t lock; }; @@ -1081,6 +1083,7 @@ omap_iommu_attach_dev(struct iommu_domain *domain, struct device *dev) } omap_domain->iommu_dev = arch_data->iommu_dev = oiommu; + omap_domain->dev = dev; oiommu->domain = domain; out: @@ -1088,19 +1091,16 @@ out: return ret; } -static void omap_iommu_detach_dev(struct iommu_domain *domain, - struct device *dev) +static void _omap_iommu_detach_dev(struct omap_iommu_domain *omap_domain, + struct device *dev) { - struct omap_iommu_domain *omap_domain = domain->priv; - struct omap_iommu_arch_data *arch_data = dev->archdata.iommu; struct omap_iommu *oiommu = dev_to_omap_iommu(dev); - - spin_lock(&omap_domain->lock); + struct omap_iommu_arch_data *arch_data = dev->archdata.iommu; /* only a single device is supported per domain for now */ if (omap_domain->iommu_dev != oiommu) { dev_err(dev, "invalid iommu device\n"); - goto out; + return; } iopgtable_clear_entry_all(oiommu); @@ -1108,8 +1108,16 @@ static void omap_iommu_detach_dev(struct iommu_domain *domain, omap_iommu_detach(oiommu); omap_domain->iommu_dev = arch_data->iommu_dev = NULL; + omap_domain->dev = NULL; +} -out: +static void omap_iommu_detach_dev(struct iommu_domain *domain, + struct device *dev) +{ + struct omap_iommu_domain *omap_domain = domain->priv; + + spin_lock(&omap_domain->lock); + _omap_iommu_detach_dev(omap_domain, dev); spin_unlock(&omap_domain->lock); } @@ -1148,13 +1156,19 @@ out: return -ENOMEM; } -/* assume device was already detached */ static void omap_iommu_domain_destroy(struct iommu_domain *domain) { struct omap_iommu_domain *omap_domain = domain->priv; domain->priv = NULL; + /* + * An iommu device is still attached + * (currently, only one device can be attached) ? + */ + if (omap_domain->iommu_dev) + _omap_iommu_detach_dev(omap_domain, omap_domain->dev); + kfree(omap_domain->pgtable); kfree(omap_domain); } diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index 779306ee7b16..0c0a37792218 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -29,15 +29,17 @@ #include <linux/device.h> #include <linux/io.h> #include <linux/iommu.h> +#include <linux/of.h> #include <asm/cacheflush.h> /* bitmap of the page sizes currently supported */ #define GART_IOMMU_PGSIZES (SZ_4K) -#define GART_CONFIG 0x24 -#define GART_ENTRY_ADDR 0x28 -#define GART_ENTRY_DATA 0x2c +#define GART_REG_BASE 0x24 +#define GART_CONFIG (0x24 - GART_REG_BASE) +#define GART_ENTRY_ADDR (0x28 - GART_REG_BASE) +#define GART_ENTRY_DATA (0x2c - GART_REG_BASE) #define GART_ENTRY_PHYS_ADDR_VALID (1 << 31) #define GART_PAGE_SHIFT 12 @@ -158,7 +160,7 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain, struct gart_client *client, *c; int err = 0; - gart = dev_get_drvdata(dev->parent); + gart = gart_handle; if (!gart) return -EINVAL; domain->priv = gart; @@ -422,6 +424,14 @@ const struct dev_pm_ops tegra_gart_pm_ops = { .resume = tegra_gart_resume, }; +#ifdef CONFIG_OF +static struct of_device_id tegra_gart_of_match[] __devinitdata = { + { .compatible = "nvidia,tegra20-gart", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_gart_of_match); +#endif + static struct platform_driver tegra_gart_driver = { .probe = tegra_gart_probe, .remove = tegra_gart_remove, @@ -429,6 +439,7 @@ static struct platform_driver tegra_gart_driver = { .owner = THIS_MODULE, .name = "tegra-gart", .pm = &tegra_gart_pm_ops, + .of_match_table = of_match_ptr(tegra_gart_of_match), }, }; @@ -448,4 +459,5 @@ module_exit(tegra_gart_exit); MODULE_DESCRIPTION("IOMMU API for GART in Tegra20"); MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>"); +MODULE_ALIAS("platform:tegra-gart"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index eb93c821f592..ecd679043d77 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -733,7 +733,7 @@ static int smmu_iommu_attach_dev(struct iommu_domain *domain, pr_info("Reserve \"page zero\" for AVP vectors using a common dummy\n"); } - dev_dbg(smmu->dev, "%s is attached\n", dev_name(c->dev)); + dev_dbg(smmu->dev, "%s is attached\n", dev_name(dev)); return 0; err_client: diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index d6f8adaa26ef..8ea7bccc7100 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -78,7 +78,7 @@ typedef int (*rproc_handle_resource_t)(struct rproc *rproc, void *, int avail); * the recovery of the remote processor. */ static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev, - unsigned long iova, int flags) + unsigned long iova, int flags, void *token) { dev_err(dev, "iommu fault: da 0x%lx flags 0x%x\n", iova, flags); @@ -117,7 +117,7 @@ static int rproc_enable_iommu(struct rproc *rproc) return -ENOMEM; } - iommu_set_fault_handler(domain, rproc_iommu_fault); + iommu_set_fault_handler(domain, rproc_iommu_fault, rproc); ret = iommu_attach_device(domain, dev); if (ret) { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d937580417ba..450293f6d68b 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -35,12 +35,13 @@ struct iommu_domain; #define IOMMU_FAULT_WRITE 0x1 typedef int (*iommu_fault_handler_t)(struct iommu_domain *, - struct device *, unsigned long, int); + struct device *, unsigned long, int, void *); struct iommu_domain { struct iommu_ops *ops; void *priv; iommu_fault_handler_t handler; + void *handler_token; }; #define IOMMU_CAP_CACHE_COHERENCY 0x1 @@ -95,7 +96,7 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, extern int iommu_domain_has_cap(struct iommu_domain *domain, unsigned long cap); extern void iommu_set_fault_handler(struct iommu_domain *domain, - iommu_fault_handler_t handler); + iommu_fault_handler_t handler, void *token); extern int iommu_device_group(struct device *dev, unsigned int *groupid); /** @@ -132,7 +133,8 @@ static inline int report_iommu_fault(struct iommu_domain *domain, * invoke it. */ if (domain->handler) - ret = domain->handler(domain, dev, iova, flags); + ret = domain->handler(domain, dev, iova, flags, + domain->handler_token); return ret; } @@ -191,7 +193,7 @@ static inline int domain_has_cap(struct iommu_domain *domain, } static inline void iommu_set_fault_handler(struct iommu_domain *domain, - iommu_fault_handler_t handler) + iommu_fault_handler_t handler, void *token) { } diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 13ef2338be41..518aea714d21 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -430,7 +430,7 @@ static struct dma_debug_entry *__dma_entry_alloc(void) */ static struct dma_debug_entry *dma_entry_alloc(void) { - struct dma_debug_entry *entry = NULL; + struct dma_debug_entry *entry; unsigned long flags; spin_lock_irqsave(&free_entries_lock, flags); @@ -438,11 +438,14 @@ static struct dma_debug_entry *dma_entry_alloc(void) if (list_empty(&free_entries)) { pr_err("DMA-API: debugging out of memory - disabling\n"); global_disable = true; - goto out; + spin_unlock_irqrestore(&free_entries_lock, flags); + return NULL; } entry = __dma_entry_alloc(); + spin_unlock_irqrestore(&free_entries_lock, flags); + #ifdef CONFIG_STACKTRACE entry->stacktrace.max_entries = DMA_DEBUG_STACKTRACE_ENTRIES; entry->stacktrace.entries = entry->st_entries; @@ -450,9 +453,6 @@ static struct dma_debug_entry *dma_entry_alloc(void) save_stack_trace(&entry->stacktrace); #endif -out: - spin_unlock_irqrestore(&free_entries_lock, flags); - return entry; } |